WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Auxiliaries Belt And Pulleys
Courtesy of VOLVO CARS OF NORTH AMERICA.
Remove:
the plastic cover on the belt tensioner using a small screwdriver. Use a wrench and turn clockwise as far as possible to relieve the load on the belt